[amsat-bb] What preamp to use for SO-50 and Arrow II antenna?

R.T.Liddy k8bl at ameritech.net
Fri May 1 16:33:09 UTC 2015

No doubt a pre-amp would help immensely. However, I don't useone when portable since my feedline is less than 10 feet long. Themore important thing is to be able to change your polarity to matchthat of the Satellite. Mismatched polarity can degrade the signal bymore than 20 dB. I seldom have trouble hearing SO-50 as long asI keep up with the tumbling of the bird.
73/GL,     Bob K8BL
      From: John Brier <johnbrier at gmail.com>
 To: AMSAT BB <amsat-bb at amsat.org> 
 Sent: Thursday, April 30, 2015 11:49 PM
 Subject: [amsat-bb] What preamp to use for SO-50 and Arrow II antenna?
Since a lot of people are talking about SO-50 right now, let me ask a question:

I did try to work SO-50 once when all I had ever worked before was
SO-35, UO-14 and AO-27 and I was horrified by how hard it was to hear
and track.

I found a thread on qrz.com where they said it's very helpful to use a
preamp for SO-50 since it's so low power, even with the short runs of
coax required for an Arrow II satellite antenna. I know almost nothing
about preamps. What's the deal? Do they need power to work
(active/passive?). What do you recommend?

John Brier, KG4AKV, Raleigh, NC, FM05
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